I guess it's a good thing that cooking is nothing like this painful thought experiment! :D
Failure is ok.
Failure is ok.
Recipes should have all the ingredients in measurable quantities. All steps should be laid out in proper order, with proper technique, times and temperatures explained.
Sure. Once you're past the beginner stage, you can just glance at the description and figure out what you need. But you have to pass that beginner stage first.